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1. 개발/실행 플랫폼
(1) OS : windows 7
(2) 개발툴 : delphi xe2
(3) 사용 Database :

2. 개발 중인 프로그램

3. 질문 내용
오래전부터 알수없는 오류가 발생하여 오류원인을 찾고있습니다.

그러던중 JCL 컴퍼넌트를 통해서 오류 정보를 받고있는데요.

직접적으로 발생한 event 에러같지않은데

아래 내역만 보고도 원인을 알 수 있을까요?

참고로 매번 발생하는 오류가 아닙니다. 사용자가 작업하다보면 어쩌다 발생합니다.

------------------------------------------------------------------------------
Exception class: EInvalidGridOperation
Exception message: Grid index out of range.
Exception address: 5046587E
------------------------------------------------------------------------------
Main thread ID = 7644
Exception thread ID = 7644
------------------------------------------------------------------------------
Exception stack
Stack list, generated 2017-05-04 17:25:58
[50465879]{vcl160.bpl  } Vcl.
[5046A948]{vcl160.bpl  } Vcl.Grids.TCustomGrid.MoveCurrent
[50469E6F]{vcl160.bpl  } Vcl.Grids.TCustomGrid.FocusCell
[5046D20A]{vcl160.bpl  } Vcl.Grids.TCustomGrid.SetRow
[012DD972]{XXXX.TMS.bpl} AdvGrid.TAdvStringGridBase.SetRowEx (Line 17934, "AdvGrid.pas" + 4)
[01334B2C]{XXXX.TMS.bpl} AdvGrid.TAdvStringGridBase.WndProc (Line 51195, "AdvGrid.pas" + 496)
[50336948]{vcl160.bpl  } Vcl.Controls.TWinControl.MainWndProc
[500B688C]{rtl160.bpl  } System.Classes.TDataModule.WriteHeight
[50454598]{vcl160.bpl  } Vcl.Forms.TApplication.CancelHint
[50453213]{vcl160.bpl  } Vcl.Forms.TApplication.ProcessMessage
[50453256]{vcl160.bpl  } Vcl.Forms.TApplication.HandleMessage
[50453595]{vcl160.bpl  } Vcl.Forms.TApplication.Run
[0048AAFC]{XXXX.EXE    } XXXX.XXXX
------------------------------------------------------------------------------

이건 다른에러
------------------------------------------------------------------------------
Exception class: EAccessViolation
Exception message: Access violation at address 5044955B in module 'vcl160.bpl'. Read of address 00000010.
Exception address: 5044955B
------------------------------------------------------------------------------
Main thread ID = 7644
Exception thread ID = 7644
------------------------------------------------------------------------------
Exception stack
Stack list, generated 2017-05-04 15:01:08
[5044955B]{vcl160.bpl  } Vcl.Forms.TCustomForm.IsFormSizeStored
[50043DA3]{rtl160.bpl  } System.UnicodeFromLocaleChars
[50037ABD]{rtl160.bpl  } System.@ReallocMem
[5003FCF4]{rtl160.bpl  } System.@UStrSetLength
[50037AEF]{rtl160.bpl  } System.@ReallocMem
[50041874]{rtl160.bpl  } System.DynArraySetLength
[500418C1]{rtl160.bpl  } System.@DynArraySetLength
[500A3982]{rtl160.bpl  } System.Classes.TList.SetCapacity
[500B47E8]{rtl160.bpl  } System.Classes.TComponent.FreeNotification
[50449541]{vcl160.bpl  } Vcl.Forms.TCustomForm.IsClientSizeStored
[5044BD95]{vcl160.bpl  } Vcl.Forms.TCustomForm.CreateParams
[50335E3A]{vcl160.bpl  } Vcl.Controls.TWinControl.CreateWnd
[50447A75]{vcl160.bpl  } Vcl.Forms.TScrollingWinControl.CreateWnd
[5044BE12]{vcl160.bpl  } Vcl.Forms.TCustomForm.CreateWnd
[5033638E]{vcl160.bpl  } Vcl.Controls.TWinControl.CreateHandle
[5033A26C]{vcl160.bpl  } Vcl.Controls.TWinControl.HandleNeeded
[5033A279]{vcl160.bpl  } Vcl.Controls.TWinControl.GetHandle
[5044E8C6]{vcl160.bpl  } Vcl.Forms.TCustomForm.Release
[5044E388]{vcl160.bpl  } Vcl.Forms.TCustomForm.Close
[503E7E1B]{vcl160.bpl  } Vcl.Extctrls.TTimer.Timer
[503E7CFF]{vcl160.bpl  } Vcl.Extctrls.TTimer.WndProc
[500B688C]{rtl160.bpl  } System.Classes.TDataModule.WriteHeight
[50453213]{vcl160.bpl  } Vcl.Forms.TApplication.ProcessMessage
[50453256]{vcl160.bpl  } Vcl.Forms.TApplication.HandleMessage
[50453595]{vcl160.bpl  } Vcl.Forms.TApplication.Run
[0048AAFC]{XXXXX.EXE   } XXXXX.XXXXX
------------------------------------------------------------------------------